Maybe? Firefighting is extremely physically demanding, which is why you'll often see firehouses with built in gym, and rarely see a fat fire fighter. So that physical capability can be used in other circumstances.

Also, firefighters need to know how to dismantle a house quickly to support their operations. So if the door needs to come off the hinges to get grandma down the stairs, firefighters will be prepared for that and have it done in 30 seconds